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Ethical Hacking simplified Network topology (Fundamnetals of system).





Network Topology

Before you attack or prevent attacking on anything, you need to know how the system works. One of the most important thing to know its fundamentals is the network. Today I'm introducing you to networking fundamental.
A network is the interconnection of two or more devices to share common resources (data, peripherals etc). Since we are just going to brush through networking there is no need to dive deep.

Network topology
Network topology is a graphical representation of the network. Network topology again can be seen as map of the network, because it represent how all the devices are connected and how they are using the network.
Classifications of topology
Physical topology represent how each devices is located, physical location, cable wiring etc.
Logical topology represents how the devices used the network regardless of their location, it grouped the devices based on their logical addresses, software installed etc.

Basic Network topologies
  • Bus topology: As the name implies, devices are connected in a bus-chairs like manner. Bus topology has a single backbone where all devices will connect. Example is an extension box which we connect all our devices to power through it. When the cable to the main switch failed all devices cant power up, they will all fail because they are all connected to one device (backbone). This is exactly what happens to bus network, when the backbone fails it affect all the devices. Technically the network is in trouble!
  • Star topology: This topology connects all the devices though a single network device. A star topology doesn't have any backup or redundant connection, to help reduce network failure when the network device failed. 
     
  • Ring topology: This topology connect devices in a circle manner, just like how a ring is. Ring networks like bus networks connects all devices through a backbone. When the backbone fails you definitely knew what will happens. wink
     
  • Mesh: This topology makes sure all devices are connected directly to each and every device on the network. This is the best network to implement though it costly, but it worth it because of its robustness.
  • Hybrid This is a network that uses more than one network topology.

    to be continued

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